739
FNUS55 KTWC 151016
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
316 AM MST TUE SEP 15 2026
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY
TERRAIN DRIVEN WINDS
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
DISCUSSION
AN ACTIVE WEEK AHEAD WITH DAILY CHANCES OF
SHOWERS AND THUNDERSTORMS. HIGH TEMPERATURES WILL FLUCTUATE
BETWEEN NEAR NORMAL AND A FEW DEGREES BELOW NORMAL. MIN RH
VALUES MAINLY 20 TO 45 PERCENT IN THE VALLEYS AND 35 TO 65
PERCENT IN THE MOUNTAINS OVER THE NEXT WEEK. RH RECOVERIES WILL
CONTINUE TO BE EXCELLENT OVERNIGHT. WINDS WILL GENERALLY REMAIN
LESS THAN 15 MPH AND TERRAIN DRIVEN. GUSTY AND ERRATIC WINDS
WILL ACCOMPANY THUNDERSTORMS.
AZZ150-152300-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
316 AM MST TUE SEP 15 2026
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........20 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........88 TO 98 DEGS.
24 HR TREND...........DOWN 4 TO 8 DEGS.
* MIN HUMIDITY.............40 TO 50 PCT.
24 HR TREND...........UP 7 TO 11 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............6864 FT AGL.
* TRANSPORT WINDS..........SOUTH 17 TO 18 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (123552 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (45-55 PCT) THEN BECOMING
MOSTLY CLOUDY (55-65 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........30 PCT.
* CHANCE OF THUNDER........20 PCT.
* MIN TEMPERATURE..........69 TO 79 DEGS.
24 HR TREND...........DOWN 3 TO 6 DEGS.
* MAX HUMIDITY.............73 TO 83 PCT.
24 HR TREND...........UP 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
WEDNESDAY
* SKY/WEATHER..............PARTLY CLOUDY (45-55 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........50 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........86 TO 96 DEGS.
24 HR TREND...........DOWN 3 TO 6 DEGS.
* MIN HUMIDITY.............43 TO 53 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 15 TO 20 MPH.
* MIXING HEIGHT............5876 FT AGL.
* TRANSPORT WINDS..........SOUTH 14 TO 15 KNOTS.
* VENTILATION CATEGORY.....VERY GOOD (88140 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 68 TO 78. HIGHS 89 TO 99. LIGHT WINDS.
MINIMUM HUMIDITY 34 TO 44 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 69 TO 79. HIGHS 93 TO 103. LIGHT
WINDS. MINIMUM HUMIDITY 24 TO 34 PCT.
SATURDAY
CLEAR. LOWS 70 TO 80. HIGHS 94 TO 104. LIGHT WINDS.
MINIMUM HUMIDITY 20 TO 30 PCT.
SUNDAY
MOSTLY CLEAR. LOWS 69 TO 79. HIGHS 93 TO 103.
MONDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 69 TO 79. HIGHS 91 TO 101.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-152300-
ARIZONA FIRE WEATHER ZONE 151
WESTERN HALF DESERT GRASSLANDS FDRA INCLUDING ELEVATIONS UP TO
5500 FEET IN SOUTHEAST CORNER OF PINAL COUNTY-
EXTREME EASTERN PIMA COUNTY-WESTERN THIRD OF COCHISE COUNTY-
SANTA CRUZ COUNTY-TDC-
316 AM MST TUE SEP 15 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (60-70 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........50 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........80 TO 90 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............48 TO 58 PCT.
24 HR TREND...........UP 6 TO 10 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 5 TO 10 MPH.
* MIXING HEIGHT............5840 FT AGL.
* TRANSPORT WINDS..........SOUTH 9 TO 10 KNOTS.
* VENTILATION CATEGORY.....GOOD (58400 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (55-65 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........40 PCT.
* CHANCE OF THUNDER........40 PCT.
* MIN TEMPERATURE..........61 TO 71 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MAX HUMIDITY.............84 TO 94 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
WEDNESDAY
* SKY/WEATHER..............MOSTLY CLOUDY (55-65 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........80 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........78 TO 88 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............54 TO 64 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............6821 FT AGL.
* TRANSPORT WINDS..........SOUTH 8 TO 9 KNOTS.
* VENTILATION CATEGORY.....GOOD (61389 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 60 TO 70. HIGHS 81 TO 91. LIGHT WINDS.
MINIMUM HUMIDITY 44 TO 54 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 61 TO 71. HIGHS 84 TO 94. LIGHT
WINDS. MINIMUM HUMIDITY 34 TO 44 PCT.
SATURDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 61 TO 71. HIGHS 84 TO 94. LIGHT WINDS.
MINIMUM HUMIDITY 30 TO 40 PCT.
SUNDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 61 TO 71. HIGHS 83 TO 93.
MONDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 60 TO 70. HIGHS 82 TO 92.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-152300-
ARIZONA FIRE WEATHER ZONE 152
EASTERN HALF DESERT GRASSLANDS FDRA INCLUDING ELEVATIONS UP TO
5500 FEET IN SOUTHWEST GRAHAM COUNTY AND EASTERN TWO THIRDS OF
COCHISE COUNTY-SOUTHERN SAN CARLOS RESERVATION-
SOUTHERN GREENLEE COUNTY BELOW 5000 FEET-TDC-
316 AM MST TUE SEP 15 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (55-65 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........40 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........80 TO 90 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............48 TO 58 PCT.
24 HR TREND...........UP 6 TO 10 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING SOUTHWEST AROUND 10
MPH IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 5 TO 10 MPH.
* MIXING HEIGHT............4186 FT AGL.
* TRANSPORT WINDS..........SOUTH 6 KNOTS.
* VENTILATION CATEGORY.....FAIR (25116 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (65-75 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........50 PCT.
* CHANCE OF THUNDER........20 PCT.
* MIN TEMPERATURE..........61 TO 71 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............81 TO 91 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
WEDNESDAY
* SKY/WEATHER..............MOSTLY CLOUDY (55-65 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........70 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........78 TO 88 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............58 TO 68 PCT.
24 HR TREND...........UP 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING SOUTH AROUND 10 MPH
IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............3768 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 8 TO 9 KNOTS.
* VENTILATION CATEGORY.....FAIR (33912 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 59 TO 69. HIGHS 80 TO 90. LIGHT WINDS.
MINIMUM HUMIDITY 45 TO 55 PCT.
FRIDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 60 TO 70. HIGHS 82 TO 92. LIGHT WINDS.
MINIMUM HUMIDITY 38 TO 48 PCT.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 60 TO 70. HIGHS 82 TO 92. LIGHT WINDS.
MINIMUM HUMIDITY 32 TO 42 PCT.
SUNDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 60 TO 70. HIGHS 81 TO 91.
MONDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 59 TO 69. HIGHS 80 TO 90.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-152300-
ARIZONA FIRE WEATHER ZONE 153
NORTHERN GRAHAM COUNTY-NORTHERN GREENLEE COUNTY-
WHITE AND GILA MOUNTAINS-APACHE SITGREAVES NF-
SOUTHERN SAN CARLOS RESERVATION ABOVE 5000 FEET-SDC-
316 AM MST TUE SEP 15 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (60-70 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........40 PCT.
* CHANCE OF THUNDER........40 PCT.
* MAX TEMPERATURE..........72 TO 82 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............49 TO 59 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING SOUTHWEST AROUND 10
MPH IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 5 TO 10 MPH.
* MIXING HEIGHT............4376 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 6 KNOTS SHIFTING TO THE
SOUTHWEST 7 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....FAIR (30632 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (65-75 PCT). SHOWERS
LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........60 PCT.
* CHANCE OF THUNDER........20 PCT.
* MIN TEMPERATURE..........54 TO 64 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............81 TO 91 PCT.
24 HR TREND...........DOWN 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
WEDNESDAY
* SKY/WEATHER..............MOSTLY CLOUDY (75-85 PCT). SHOWERS
LIKELY AND CHANCE OF THUNDERSTORMS.
* CHANCE OF PRECIP.........70 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........68 TO 78 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............59 TO 69 PCT.
24 HR TREND...........UP 7 TO 11 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING SOUTH AROUND 10 MPH
IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 15 TO 20 MPH.
* MIXING HEIGHT............4163 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 11 KNOTS.
* VENTILATION CATEGORY.....GOOD (45793 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS. LOWS
53 TO 63. HIGHS 69 TO 79. LIGHT WINDS. MINIMUM HUMIDITY 51 TO
61 PCT.
FRIDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 52 TO 62. HIGHS 72 TO 82. LIGHT WINDS.
MINIMUM HUMIDITY 41 TO 51 PCT.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 51 TO 61. HIGHS 73 TO 83. LIGHT WINDS.
MINIMUM HUMIDITY 35 TO 45 PCT.
SUNDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 51 TO 61. HIGHS 72 TO 82.
MONDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 51 TO 61. HIGHS 70 TO 80.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-152300-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
316 AM MST TUE SEP 15 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (60-70 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........60 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........69 TO 79 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............63 TO 73 PCT.
24 HR TREND...........UP 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH IN THE MORNING
BECOMING LIGHT.
* 10000 FT MSL WIND........SOUTH 5 TO 10 MPH.
* MIXING HEIGHT............5628 FT AGL.
* TRANSPORT WINDS..........SOUTH 6 TO 7 KNOTS.
* VENTILATION CATEGORY.....FAIR (36582 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (65-75 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........40 PCT.
* CHANCE OF THUNDER........20 PCT.
* MIN TEMPERATURE..........55 TO 65 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MAX HUMIDITY.............85 TO 95 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING SOUTHEAST AROUND 10
MPH AFTER MIDNIGHT.
* 10000 FT MSL WIND........SOUTHEAST 10 TO 15 MPH.
WEDNESDAY
* SKY/WEATHER..............MOSTLY CLOUDY (55-65 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........70 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........67 TO 77 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............67 TO 77 PCT.
24 HR TREND...........UP 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH IN THE MORNING
BECOMING LIGHT.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............6271 FT AGL.
* TRANSPORT WINDS..........SOUTH 7 TO 8 KNOTS.
* VENTILATION CATEGORY.....GOOD (47032 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 54 TO 64. HIGHS 70 TO 80. LIGHT WINDS.
MINIMUM HUMIDITY 58 TO 68 PCT.
FRIDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 55 TO 65. HIGHS 73 TO 83. LIGHT WINDS.
MINIMUM HUMIDITY 47 TO 57 PCT.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 55 TO 65. HIGHS 72 TO 82. LIGHT WINDS.
MINIMUM HUMIDITY 44 TO 54 PCT.
SUNDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 55 TO 65. HIGHS 72 TO 82.
MONDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 54 TO 64. HIGHS 70 TO 80.
NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE
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